Got a big problem here guys, need help if possible, I brought and install Jagged Alliance 2 last night, since then I have not been able to load one single saved game, it makes no difference if I saved in tactical screen or map screen, everytime it would say "error loading game", tried starting different new games to make this is not a single incident, and it is not. I am running Jagged Alliance 2 on a brand new laptop, Window Vista, Intel Centrino Duo 2.00G, with 4GB of RAM. All other game I brought from GOG seem to work fine on this laptop; Fallout 2, Fallout tactics etc.
Please help, any suggestion or advice will be great.

Can't load any saved games which is a bit of a bummer as i love this game. any help would be much appreciated.

Did you even read previous posts and try those options?

I will sum up the previous suggestions, which all helped me on the way.

My problem was a mix of several, frequent crashes, run time errors, game save errors. Upon loading I would get an error like numerous others have reported.

The fix:

1. Changing write protection on game folder
2. Changing permissions on game folder

This helped - but was not final. Here is a tip for those that still struggle

3.1 Changing win 7 settings to show hidden folders - I declare a 7 year pox upon microsoft.
3.2 Changing ownership of the application data folder (in root:/users/USERNAME/Application Data/GoG.com/Jagged Alliance/) from administrator to the currently logged in user.

Both of these fixes can be googled for detailed how-to.

After this - all problems solved. Save games work brilliantly - havent had a single crash since then (excepting the one you get when you exit the game, but I couldnt care less about that)

Do I HAVE to have the 1.13 patch for this to run properly? I've got near constant crashes as well as unretrievable savegames. I just installed the 1.12 patch, but that hasn't changed anything (if anything, it seems to have compounded the problems. Mercs walk backwards, etc.)

1.12 is included in the GOG version. Walking backwards is done if you press alt, thus if you alt-tab out of the game, tap alt again to toggle it off. You don't need 1.13, and it is recommended that you install it only after you are comfortable with the game mechanics and tactics.